Sidabutar, Putri Yanita, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Sidabutar, Putri Rebecca, Department of Chemistry, Faculty of Mathematics and Sciences, Universitas Negeri Medan, Medan 20221, Indonesia
Siggalingging, Nelsy Theresia, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Medan State University, Medan (Indonesia)
Sihaloho, Predy Fernandes, Chemistry Departement, Universitas Negeri Medan (Indonesia)
Sihite, Judika A.M, Department of Biology, Faculty of Mathematics and Natural Sciences, State University of Medan (Indonesia)

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